[Theory-seminars] Theory Seminar, Monday, ***2:45PM***, Room F324/325 - Dmitrij Siemens

[Alessandro Pilloni]

Theory Center Seminar
Monday, Nov. 21, 2016
2:45 p.m.
CEBAF Center, Room F324/325 
Dmitrij Siemens (Bochum U.)
Title:   "Pion-Nucleon Scattering in Chiral Perturbation Theory"

Abstract: 
Elastic pion-nucleon scattering is analyzed in the framework of chiral perturbation theory
at the full one-loop order with explicit Delta degrees of freedom.
The analysis is performed in the small scale expansion within the heavy baryon and
a covariant approach based on the extended on mass-shell renormalization scheme.
The pertinent low-energy constants contributing to the pion-nucleon scattering amplitude
are extracted from fits to experimental scattering data as well as subthreshold parameters.
A novel approach to estimate the theoretical uncertainty based on the truncation of the chiral
series is employed in the fitting procedure. The obtained results for the various pion-nucleon
scattering observables are presented and discussed.

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